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A single-phase, 50Hz transformer has 40 primary turns and 520 secondary turns.
The cross-sectional area of the core is 270cm2.
When the primary winding is connected to a 300 volt supply,
Determine (a) the maximum value of flux density in the core, and
(b) the voltage induced in the secondary winding.
Q. Collector current I c =20 mA and base current I b = 50 A. Find current gain β of a transistor. β = I C / I B = 20 X 10 -3 / 50 X 10 -6 = 400
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